河涌治理中拆除轻型桥台支撑梁对桩基的影响分析

Research on the Influence of Removing Supported Type Abutment Support Beams on Pile Foundation in Riverlet Management Projects

在河涌排水治理项目中,小桥轻型桥台设有支撑梁,受到水流的长期冲刷,支撑梁裸露高出河床面,严重影响了河涌的排水排污,为解决河涌排水问题,须拆除原支撑梁。利用有限元软件,建立拆除支撑梁前后及加固方案有限元模型,分别得到桩基的内力、位移结果,结果表明:拆除轻型桥台支撑梁对桩基影响较大,将支撑梁下移,桩顶新建支撑梁后拆除的加固方案可行。

In the river drainage treatment project,the light bridge abutment of the small bridge is equipped with support beams.Due to long-term erosion by water flow,the support beams are exposed above the riverbed surface,seriously affecting the drainage and discharge of the river.In order to solve the drainage problem of the river,the original support beams need to be removed.This article demonstrates the impact of removing the light bridge abutment support beams on the pile foundation.The article uses finite element software to establish finite element models of the pre-,post-,and reinforcement schemes before and after the removal of the support beam,and obtains the internal force and displacement results of the pile foundation.The results show that the removal of the lightweight bridge abutment support beam has a significant impact on the pile foundation.Moving the support beam downwards and constructing a new support beam at the top of the pile,the reinforcement scheme after removal is feasible,providing reference and assistance for the treatment of river surges under the bridge.